package com.example.myapplication;

public  abstract  class str {
    public final static String SEVEN = "7";
    public final static String EIGHT = "8";
    public final static String NINE = "9";
    public final static String FOUR = "4";
    public final static String FIVE = "5";
    public final static String SIX = "6";
    public final static String ONE = "1";
    public final static String TWO = "2";
    public final static String THREE = "3";
    public final static String ZERO = "0";

    public final  static String DIVIDE = "÷";

    public final  static String MULTIPLY = "x";

    public final static String PLUS ="+";

    public final static String MINUS = "-";

    public final static String ERROR = "错误";

    public final static String SQRT = "√";

    public final static String RECIPROCAL = "^—1";

    public final static String DOT = ".";
}
